joey shelton / LED_Demo2

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Dependencies:   MAX44000 PWM_Tone_Library nexpaq_mdk

Fork of LED_Demo by joey shelton

mbd_os/hal/common/RawSerial.cpp@9:6bb35cef007d, 2016-10-22 (annotated)

Committer:
cyberjoey
Date:
Sat Oct 22 01:31:58 2016 +0000
Revision:
9:6bb35cef007d
Parent:
1:55a6170b404f 
WORKING

Who changed what in which revision?

UserRevisionLine numberNew contents of line
nexpaq 1:55a6170b404f 1 /* mbed Microcontroller Library
nexpaq 1:55a6170b404f 2 * Copyright (c) 2006-2013 ARM Limited
nexpaq 1:55a6170b404f 3 *
nexpaq 1:55a6170b404f 4 * Licensed under the Apache License, Version 2.0 (the "License");
nexpaq 1:55a6170b404f 5 * you may not use this file except in compliance with the License.
nexpaq 1:55a6170b404f 6 * You may obtain a copy of the License at
nexpaq 1:55a6170b404f 7 *
nexpaq 1:55a6170b404f 8 * http://www.apache.org/licenses/LICENSE-2.0
nexpaq 1:55a6170b404f 9 *
nexpaq 1:55a6170b404f 10 * Unless required by applicable law or agreed to in writing, software
nexpaq 1:55a6170b404f 11 * distributed under the License is distributed on an "AS IS" BASIS,
nexpaq 1:55a6170b404f 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
nexpaq 1:55a6170b404f 13 * See the License for the specific language governing permissions and
nexpaq 1:55a6170b404f 14 * limitations under the License.
nexpaq 1:55a6170b404f 15 */
nexpaq 1:55a6170b404f 16 #include "RawSerial.h"
nexpaq 1:55a6170b404f 17 #include "wait_api.h"
nexpaq 1:55a6170b404f 18 #include <cstdarg>
nexpaq 1:55a6170b404f 19
nexpaq 1:55a6170b404f 20 #if DEVICE_SERIAL
nexpaq 1:55a6170b404f 21
nexpaq 1:55a6170b404f 22 #define STRING_STACK_LIMIT 120
nexpaq 1:55a6170b404f 23
nexpaq 1:55a6170b404f 24 namespace mbed {
nexpaq 1:55a6170b404f 25
nexpaq 1:55a6170b404f 26 RawSerial::RawSerial(PinName tx, PinName rx) : SerialBase(tx, rx) {
nexpaq 1:55a6170b404f 27 // No lock needed in the constructor
nexpaq 1:55a6170b404f 28 }
nexpaq 1:55a6170b404f 29
nexpaq 1:55a6170b404f 30 int RawSerial::getc() {
nexpaq 1:55a6170b404f 31 lock();
nexpaq 1:55a6170b404f 32 int ret = _base_getc();
nexpaq 1:55a6170b404f 33 unlock();
nexpaq 1:55a6170b404f 34 return ret;
nexpaq 1:55a6170b404f 35 }
nexpaq 1:55a6170b404f 36
nexpaq 1:55a6170b404f 37 int RawSerial::putc(int c) {
nexpaq 1:55a6170b404f 38 lock();
nexpaq 1:55a6170b404f 39 int ret = _base_putc(c);
nexpaq 1:55a6170b404f 40 unlock();
nexpaq 1:55a6170b404f 41 return ret;
nexpaq 1:55a6170b404f 42 }
nexpaq 1:55a6170b404f 43
nexpaq 1:55a6170b404f 44 int RawSerial::puts(const char *str) {
nexpaq 1:55a6170b404f 45 lock();
nexpaq 1:55a6170b404f 46 while (*str)
nexpaq 1:55a6170b404f 47 putc(*str ++);
nexpaq 1:55a6170b404f 48 unlock();
nexpaq 1:55a6170b404f 49 return 0;
nexpaq 1:55a6170b404f 50 }
nexpaq 1:55a6170b404f 51
nexpaq 1:55a6170b404f 52 // Experimental support for printf in RawSerial. No Stream inheritance
nexpaq 1:55a6170b404f 53 // means we can't call printf() directly, so we use sprintf() instead.
nexpaq 1:55a6170b404f 54 // We only call malloc() for the sprintf() buffer if the buffer
nexpaq 1:55a6170b404f 55 // length is above a certain threshold, otherwise we use just the stack.
nexpaq 1:55a6170b404f 56 int RawSerial::printf(const char *format, ...) {
nexpaq 1:55a6170b404f 57 lock();
nexpaq 1:55a6170b404f 58 std::va_list arg;
nexpaq 1:55a6170b404f 59 va_start(arg, format);
nexpaq 1:55a6170b404f 60 // ARMCC microlib does not properly handle a size of 0.
nexpaq 1:55a6170b404f 61 // As a workaround supply a dummy buffer with a size of 1.
nexpaq 1:55a6170b404f 62 char dummy_buf[1];
nexpaq 1:55a6170b404f 63 int len = vsnprintf(dummy_buf, sizeof(dummy_buf), format, arg);
nexpaq 1:55a6170b404f 64 if (len < STRING_STACK_LIMIT) {
nexpaq 1:55a6170b404f 65 char temp[STRING_STACK_LIMIT];
nexpaq 1:55a6170b404f 66 vsprintf(temp, format, arg);
nexpaq 1:55a6170b404f 67 puts(temp);
nexpaq 1:55a6170b404f 68 } else {
nexpaq 1:55a6170b404f 69 char *temp = new char[len + 1];
nexpaq 1:55a6170b404f 70 vsprintf(temp, format, arg);
nexpaq 1:55a6170b404f 71 puts(temp);
nexpaq 1:55a6170b404f 72 delete[] temp;
nexpaq 1:55a6170b404f 73 }
nexpaq 1:55a6170b404f 74 va_end(arg);
nexpaq 1:55a6170b404f 75 unlock();
nexpaq 1:55a6170b404f 76 return len;
nexpaq 1:55a6170b404f 77 }
nexpaq 1:55a6170b404f 78
nexpaq 1:55a6170b404f 79 /** Acquire exclusive access to this serial port
nexpaq 1:55a6170b404f 80 */
nexpaq 1:55a6170b404f 81 void RawSerial::lock() {
nexpaq 1:55a6170b404f 82 // No lock used - external synchronization required
nexpaq 1:55a6170b404f 83 }
nexpaq 1:55a6170b404f 84
nexpaq 1:55a6170b404f 85 /** Release exclusive access to this serial port
nexpaq 1:55a6170b404f 86 */
nexpaq 1:55a6170b404f 87 void RawSerial::unlock() {
nexpaq 1:55a6170b404f 88 // No lock used - external synchronization required
nexpaq 1:55a6170b404f 89 }
nexpaq 1:55a6170b404f 90
nexpaq 1:55a6170b404f 91 } // namespace mbed
nexpaq 1:55a6170b404f 92
nexpaq 1:55a6170b404f 93 #endif